English verb conjugation
COULD PIE

Regular verb: pie - pied - pied

Affirmation

Simple form	V-ing form
I could pie you could pie he could pie we could pie you could pie they could pie	I could be pying you could be pying he could be pying we could be pying you could be pying they could be pying
Perfect	V-ing perfect
I could have pied you could have pied he could have pied we could have pied you could have pied they could have pied	I could have been pying you could have been pying he could have been pying we could have been pying you could have been pying they could have been pying

Negation

Simple form	V-ing form
I couldn't pie you couldn't pie he couldn't pie we couldn't pie you couldn't pie they couldn't pie	I couldn't be pying you couldn't be pying he couldn't be pying we couldn't be pying you couldn't be pying they couldn't be pying
Perfect	V-ing perfect
I couldn't have pied you couldn't have pied he couldn't have pied we couldn't have pied you couldn't have pied they couldn't have pied	I couldn't have been pying you couldn't have been pying he couldn't have been pying we couldn't have been pying you couldn't have been pying they couldn't have been pying

Interrogative form

Simple form	V-ing form
could I pie? could you pie? could he pie? could we pie? could you pie? could they pie?	could I be pying? could you be pying? could he be pying? could we be pying? could you be pying? could they be pying?
Perfect	V-ing perfect
could I have pied? could you have pied? could he have pied? could we have pied? could you have pied? could they have pied?	could I have been pying? could you have been pying? could he have been pying? could we have been pying? could you have been pying? could they have been pying?

Interro-negative form

Simple form	V-ing form
couldn't I pie? couldn't you pie? couldn't he pie? couldn't we pie? couldn't you pie? couldn't they pie?	couldn't I be pying? couldn't you be pying? couldn't he be pying? couldn't we be pying? couldn't you be pying? couldn't they be pying?
Perfect	V-ing perfect
couldn't I have pied? couldn't you have pied? couldn't he have pied? couldn't we have pied? couldn't you have pied? couldn't they have pied?	couldn't I have been pying? couldn't you have been pying? couldn't he have been pying? couldn't we have been pying? couldn't you have been pying? couldn't they have been pying?